科研之友
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摘要
We discover that the mass of dark matter particles m(DM) is imprinted in phase correlations of the cosmic density field more significantly than in the two-point correlation. In particular, phase correlations trace m(DM) out to scales about five times larger than the two-point correlation. This result relies on a new estimator l(r) of pure phase information in Fourier space, which can be interpreted as a parameter-free and scale-invariant tracer of filament-like structure. Based on simulated density fields, we show how mDM can, in principle, be measured using l(r), given a suitably reconstructed density field.
- 出版日期2013-1-10
